46 lines
1.7 KiB
Ada
46 lines
1.7 KiB
Ada
-- Copyright (C) 2015 Daniel Otte <bg@nerilex.org>
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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with Crypto_Core_Types; use Crypto_Core_Types;
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with Crypto_Types; use Crypto_Types;
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with Spritz;
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use Crypto_Types.Crypto_Types_u8;
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package Spritz_AEAD is
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type Context is private;
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procedure Initialize (ctx : out Context; key : in u8_Array);
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procedure Initialize (ctx : out Context; key : in String);
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procedure Set_Nonce (ctx : in out Context; nonce : in u8_Array);
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procedure Set_Nonce (ctx : in out Context; nonce : in String);
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procedure Add_Header (ctx : in out Context; header : in u8_Array);
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procedure Encrypt_Data (ctx : in out Context; data : in out u8_Array);
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procedure Extract_Tag (ctx : in out Context; tag : out u8_Array);
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procedure Decrypt_Data (ctx : in out Context; data : in out u8_Array);
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private
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type state_t is (pre_initialize, pre_nonce, pre_header, pre_data, post_tag);
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type Context is record
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state : state_t := pre_initialize;
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ctx : Spritz.Context;
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offset : Integer range 1 .. Spritz.N / 4;
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buffer : u8_Array(1 .. Spritz.N / 4);
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end record;
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end Spritz_AEAD;
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